Sewing-machine



Model.)

W. T. HART. SEWING MACHINE.

No. 597,610. Patented Jan. 18,1898.

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. UNITED STATES union.

PATENT VILLIAM T. HART, OF KEENE, NEIV HAMPSHIRE, ASSIGN OR TO THE UNIONSPECIAL SEW'ING MACHINE COMPANY, OF CHICAGO, ILLINOIS.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 597,610, dated January18, 1898.

Application filed August 6, 1896.

To all whom it may concern:

Be it known thatLIVILLIAM T. HART, a citizen of the United States,residing at Keene, in the county of Cheshire, State of New Hampshire,have invented certain new and useful Improvements in Sewing-Machines, ofwhich the following is a description, reference being had to theaccompanying drawings and to the letters of reference marked thereon Myinvention relates to an improvement in sewing-machines, and especiallyto a device or arrangement for adjusting the loopers on chain-stitchsewing-machines, whereby the time at which the looper catches theneedlethread loop may be varied or the amount of movement of said looperon one side or the other of the plane of the needles may be changed, orwhere a plurality of loopers are used their distance apart may be variedto accord with any change in position of the needles to vary the gage ofthe machine.

The object of the invention is to provide a comparatively simple andinexpensive device whereby the above results may be accomplished; andthe invention consists in the matters hereinafter described, andreferred to in the appended claim.

The invention. is illustrated in the accompanying drawings, in which-Figure 1 is a detail View of the looper rocker and support of thewell-known Union Special machine, showing my invention applied thereto.Fig. 2 is a similar view showing the invention applied to another typeof chainstitch machine. Fi g. 3 is a similar view showin g it applied tostill another type of machine, and Fig. 4 is a detail view of thesocketed holder.

In the drawings, and referring especially to Fig. 1, A represents as awhole the looper support or carrier, which is substantially the same asshown in Patent No. 299,568 and comprises a looper-supporting head 0,journaled at its lower end on a stud actuated by a pitinan D, having ahead Ct, having a ball-joint connection with the part 0.

In Fig. 2 the looper support or carrier A is $erial No. 6011855. (N0model.)

supported on trunnions which slide and rock in fixed bearings on themachine-frame and has its movements imparted to it by a bent pin E,which is included between flanges b on the looper-carrier, and there isalso provided an eccentric 0, working in a yoke on the carrier, whichgives the sliding movement to the latter.

In Fig. 3 the looper support or carrier A is somewhat similar in shapeto that shown in Fig. 2.

In Fig. 1 the looper-supporting head and in Figs. 2 and 3 the support orcarrier proper is provided with openings within which are held byset-screws d split sleeves or tubes F, having the openings 6 thereinarranged eccentrically of the central axis thereof, and in theseopenings the shanks of the loopers G are placed and clamped, after beingadjusted to proper position, by the set-screws d, which compress thesides of the split tube around the shank of the looper. It will be seenby this construction that by loosening the setscrew (1 and turning thesocketed cylindrical holders F so that the sockets are at the closestpoints to each other the loopers may be arranged very closely togetherand applied to a narrow-gage machine. If turned diametrically opposite,they will be adapted to a very wide gage machine. Furthermore, byshiftin g the positions of these socketed holders the distance of thepoint of the looper from the plane of the needle may be varied eitherforwardly or backwardly or laterally, thereby changing the time at whichthe looper catches the needle-thread or varying the amount of movementof the looper laterally on one side or the other of the plane of theneedle.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

A looper mechanism for sewing-machines comprising a carrier or supportprovided with a plurality of sockets, a plurality of split socket-piecesadapted to the sockets of the carrier or support, said socket-piecesbeing eccentrically bored for the reception of the shanks of theloopers, and means for adjust- In testimony whereof I affix my signatureably securing the socket-pieces Within the-carin presence 01": twowitnesses.

- rier 01' support and the shanks of the loopers Within thesocket-pieces, whereby the loopers may be adjusted relative to eachother and Witnesses: also relative to the needle; substantially as DONH. W'OODWARD, described. L. WELLINGTON.

WILLIAM T, HART.

